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crosswords shape bases clocks digital clocks dice palindromes doubling dates addition crossnumber indices graphs dominos dodecagons axes multiplication irreducible numbers time grids ave complex numbers routes chalkdust crossnumber ellipses coins scales expansions albgebra squares sum to infinity numbers wordplay tournaments spheres gerrymandering cryptic crossnumbers even numbers taxicab geometry combinatorics products polygons odd numbers consecutive integers cards unit fractions volume surds integration perfect numbers geometric mean money averages parabolas star numbers digital products partitions fractions circles factors shapes balancing cryptic clues lines sets polynomials speed triangles algebra remainders 3d shapes mean menace probabilty determinants folding tube maps geometry books decahedra median colouring differentiation angles square roots proportion digits consecutive numbers christmas planes multiples factorials percentages advent perimeter hexagons triangle numbers means matrices rugby symmetry area arrows trigonometry range people maths calculus sums sequences cube numbers quadrilaterals pascal's triangle sport number games quadratics regular shapes chocolate binary integers chess the only crossnumber division functions geometric means crossnumbers pentagons 2d shapes logic square numbers cubics elections prime numbers floors tangents probability coordinates tiling rectangles